A man is suing prison authorities for £3.8 million after he was mocked by guards and not treated, for a four-day erection caused by a pill he took in jail.

Dustin Lance, 32, said he suffered “unbearable pain” from the 91-hour arousal and has suffered “irreparable harm to his penis”.

He was booked into Pittsburg County jail on 15 December last year and was transferred to a health centre four days later.

Doctors there said he needed to be seen immediately by a urology specialist, but he was instead returned to the jail. He was released later that day and charges of burglary against him were dropped two months later.